1) Trucker/Military Slang for No/None/Negative
2) Refers to anything which disagrees with a previous assumption/theory

1) "This is Carne Grande. I'm on Route 129 from Phoenix to Yuma. Any Smokies out there?" "Thats a big negatory, Carne. Looks like we got ourselves a convoy."
2) "Your argument that Spam is the best processed meat product is negatory to the statement released in October by the National Processed Meat Product Board."

Negatory: Negation function word used by people who want to sound like someone with something important to say over a crackly, electronic communications system, like a fighter pilot or little league coaches with walky talky attachments for their iphones.

Subject 1: "Evan, do you not want another beer?"

Subject 2: "Negatory"

Subject 1: Is "Your argument that Spam is the best processed meat product is negatory to the statement released in October by the National Processed Meat Product Board," a correct usage of negatory?

Subject 2: Negatory. Negatory can be employed solely as a noun/ function word, indicating a negative response to the preceding clause. It cannot be used as an adjective in the manner of 'contradictory,' nor can it be an adverb except in one case:when it means 'not so' —used to express negation, dissent, denial, or refusal "Negatory, I am not doing it." The act or instance of refusing or denying by the use of the word negatory as in "That's a negatory" is permissible.